2663618857 has 2 divisors, whose sum is σ = 2663618858. Its totient is φ = 2663618856.

The previous prime is 2663618851. The next prime is 2663618861. The reversal of 2663618857 is 7588163662.

2663618857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2660393241 + 3225616 = 51579^2 + 1796^2 .

It is a cyclic number.

It is not a de Polignac number, because 2663618857 - 2⁷ = 2663618729 is a prime.

It is not a weakly prime, because it can be changed into another prime (2663618851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1331809428 + 1331809429.

It is an arithmetic number, because the mean of its divisors is an integer number (1331809429).

Almost surely, 2^2663618857 is an apocalyptic number.

It is an amenable number.

2663618857 is a deficient number, since it is larger than the sum of its proper divisors (1).

2663618857 is an equidigital number, since it uses as much as digits as its factorization.

2663618857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2903040, while the sum is 52.

The square root of 2663618857 is about 51610.2592223678. The cubic root of 2663618857 is about 1386.1940390019.

The spelling of 2663618857 in words is "two billion, six hundred sixty-three million, six hundred eighteen thousand, eight hundred fifty-seven".